DxGrid.GetGroupSummaryDisplayText(IGridSummaryItem, Int32) Method
Namespace: DevExpress.Blazor
Assembly:
DevExpress.Blazor.v21.2.dll
NuGet Package:
DevExpress.Blazor
Declaration
public string GetGroupSummaryDisplayText(
IGridSummaryItem item,
int visibleIndex
)
Parameters
Name |
Type |
Description |
item |
IGridSummaryItem |
The group summary item.
|
visibleIndex |
Int32 |
The group row’s index.
|
Returns
Type |
Description |
String |
The group summary item’s display text.
|
You can handle the CustomizeSummaryDisplayText event to customize the summary display text.
The example below illustrates how to customize group rows. These rows contain group field values and summary values that are formatted in italics.
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@implements IDisposable
<DxGrid Data="@Data"
ShowGroupPanel="true"
CustomizeSummaryDisplayText="Grid_CustomizeSummaryDisplayText">
<Columns>
<DxGridDataColumn FieldName="Country" GroupIndex="0" Width="200px">
<GroupRowTemplate>
<text>@context.DataColumn.FieldName : @context.GroupValue</text>
@{
var summaryItems = context.Grid.GetGroupSummaryItems();
if (summaryItems.Any())
{
<text> (</text>
foreach (var i in summaryItems)
{
<i>@context.Grid.GetGroupSummaryDisplayText(i, context.VisibleIndex)</i>
}
<text>)</text>
}
}
</GroupRowTemplate>
</DxGridDataColumn>
<DxGridDataColumn FieldName="City" />
<DxGridDataColumn FieldName="OrderDate" Width="200px" />
<DxGridDataColumn FieldName="UnitPrice" DisplayFormat="c" Width="120px" />
<DxGridDataColumn FieldName="Quantity" Width="120px" />
</Columns>
<GroupSummary>
<DxGridSummaryItem SummaryType="GridSummaryItemType.Count" FieldName="Country" />
</GroupSummary>
</DxGrid>
@* ... *@
@code {
object Data { get; set; }
NorthwindContext Northwind { get; set; }
IGrid Grid1 { get; set; }
@* ... *@
protected override void OnInitialized() {
Northwind = NorthwindContextFactory.CreateDbContext();
Data = Northwind.Invoices
.ToList();
}
void Grid_CustomizeSummaryDisplayText(GridCustomizeSummaryDisplayTextEventArgs e) {
e.DisplayText = string.Format("Count of Orders : {0}", e.Value);
}
public void Dispose() {
Northwind?.Dispose();
}
}
using System;
#nullable disable
namespace Grid.Northwind {
public partial class Invoice {
public string ShipName { get; set; }
public string ShipAddress { get; set; }
public string ShipCity { get; set; }
public string ShipRegion { get; set; }
public string ShipPostalCode { get; set; }
public string ShipCountry { get; set; }
public string CustomerId { get; set; }
public string CustomerName { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string Region { get; set; }
public string PostalCode { get; set; }
public string Country { get; set; }
public string Salesperson { get; set; }
public int OrderId { get; set; }
public DateTime? OrderDate { get; set; }
public DateTime? RequiredDate { get; set; }
public DateTime? ShippedDate { get; set; }
public string ShipperName { get; set; }
public int ProductId { get; set; }
public string ProductName { get; set; }
public decimal UnitPrice { get; set; }
public short Quantity { get; set; }
public float Discount { get; set; }
public decimal? ExtendedPrice { get; set; }
public decimal? Freight { get; set; }
}
}
using Microsoft.EntityFrameworkCore;
#nullable disable
namespace Grid.Northwind {
public partial class NorthwindContext : DbContext {
public NorthwindContext(DbContextOptions<NorthwindContext> options)
: base(options) {
}
// ...
public virtual DbSet<Invoice> Invoices { get; set; }
// ...
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) {
if(!optionsBuilder.IsConfigured) {
optionsBuilder.UseSqlServer("Server=.\\sqlexpress;Database=Northwind;Integrated Security=true");
}
}
// ...
protected override void OnModelCreating(ModelBuilder modelBuilder) {
// ...
modelBuilder.Entity<Invoice>(entity => {
entity.HasNoKey();
entity.ToView("Invoices");
entity.Property(e => e.Address).HasMaxLength(60);
entity.Property(e => e.City).HasMaxLength(15);
entity.Property(e => e.Country).HasMaxLength(15);
entity.Property(e => e.CustomerId)
.HasMaxLength(5)
.HasColumnName("CustomerID")
.IsFixedLength(true);
entity.Property(e => e.CustomerName)
.IsRequired()
.HasMaxLength(40);
entity.Property(e => e.ExtendedPrice).HasColumnType("money");
entity.Property(e => e.Freight).HasColumnType("money");
entity.Property(e => e.OrderDate).HasColumnType("datetime");
entity.Property(e => e.OrderId).HasColumnName("OrderID");
entity.Property(e => e.PostalCode).HasMaxLength(10);
entity.Property(e => e.ProductId).HasColumnName("ProductID");
entity.Property(e => e.ProductName)
.IsRequired()
.HasMaxLength(40);
entity.Property(e => e.Region).HasMaxLength(15);
entity.Property(e => e.RequiredDate).HasColumnType("datetime");
entity.Property(e => e.Salesperson)
.IsRequired()
.HasMaxLength(31);
entity.Property(e => e.ShipAddress).HasMaxLength(60);
entity.Property(e => e.ShipCity).HasMaxLength(15);
entity.Property(e => e.ShipCountry).HasMaxLength(15);
entity.Property(e => e.ShipName).HasMaxLength(40);
entity.Property(e => e.ShipPostalCode).HasMaxLength(10);
entity.Property(e => e.ShipRegion).HasMaxLength(15);
entity.Property(e => e.ShippedDate).HasColumnType("datetime");
entity.Property(e => e.ShipperName)
.IsRequired()
.HasMaxLength(40);
entity.Property(e => e.UnitPrice).HasColumnType("money");
});
// ...
OnModelCreatingPartial(modelBuilder);
}
partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
}
}
using Microsoft.EntityFrameworkCore;
// ...
public class Startup {
// ...
public void ConfigureServices(IServiceCollection services) {
// ...
services.AddDbContextFactory<NorthwindContext>((sp, options) => {
var env = sp.GetRequiredService<IWebHostEnvironment>();
var dbPath = Path.Combine(env.ContentRootPath, "Northwind-5e44b51f.mdf");
options.UseSqlServer("Server=(localdb)\\MSSQLLocalDB;Integrated Security=true;AttachDbFileName=" + dbPath);
});
}
// ...
}
using Microsoft.EntityFrameworkCore;
// ...
builder.Services.AddDbContextFactory<NorthwindContext>((sp, options) => {
var env = sp.GetRequiredService<IWebHostEnvironment>();
var dbPath = Path.Combine(env.ContentRootPath, "Northwind-5e44b51f.mdf");
options.UseSqlServer("Server=(localdb)\\MSSQLLocalDB;Integrated Security=true;AttachDbFileName=" + dbPath);
});
See Also